$\"\"$

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The radius of the circle(r) = $\"\"$ .

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Area of a circle is $\"\"$ .

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Substitute r = $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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Apply power of a product property $\"\"$ .

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$\"\"$

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$\"\"$

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Apply power of a power property $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The area of circle $\"\"$ units.